Coffee-urn.



to be b oiled and Which is closed, except as hereinafter stated.

Arranged within ehe jacket B and suitably spaced fr m the Walls thereof is the coffeecontainer D, Whih is forrned with the usual rounded bottom and has its upper edge flanged outwardly eo form a cld'sure between its s1des and the adjacent sides of the jacket B, thus forming a chamber C, Which serves as an air-qhamber around the container D and which is provided with means for regulating the temperature of the air therein, as Will be described'.

' gas is-controlled in the usualmanner. Communioaoing with the water-chamber is a water-gagejand a cook j, the latter 'serving to draw off water, as may be desired. Cq1 n municating with the upper part of the water chamber is the uSual safety relief-pipe A".

Communicating w1'th the lower part of the Walter-chamber isa pipe 7c the upper end of which leads direotly over the coflee-container. This ipe is sup lied With a hand-valve k, by whic 1s contro led the passag 0f the w ater fronifihe waterohamber to ehe contamer, such Pas'sage beingnormally efiected, as will be raadily understood, -by the ex ans1on of the Wa ter fiom heat fuinished by t e burner.

In the bottom of the coffee-container is a hollovv "screw e, with which communicates the inner end of a pipe e, on the outer end of which is a cock e", from which the coffee isd1siwn as required'. The usual cofieeage e is' secured to the side of the casin'g A an communicates with th'e pipe e through ehe c0ck e.

T6 revent the water from boiling the cofleein t e horizontal portion of the p1ge e, I surchaniberi the watr from the water-chamber through round the latlter with a water-t1g t pipe H, Whi'qh coinniunicates with the air-chamber C through the short pipe h and has i ts inner end screwed into a box-ing h, Whi0h sur'rounds the vertical ortion of the pipe e and protects sarn e ffonit e heat 0f the water in the Water- The boxing is of greater diameter than the pipe, thus f0rm ing a charnber around the latter, a'nd is formed with a threaded extejasion into which is screwed the hollow screw e,through which a vertical opening is formed Which regisbers with the 11 per end of the pipe e. Small holes h are dril ed through the extension of the boxing and permit ailf 130 pass from the pipe H'to the chamber C, thus efl"ecting a circulation of air at this point. a

T0 provi&e for fihe constant circulati'on of the coil, and thus keep it ab the desired temerature with the minimum heat ab the urner, I extend the i ec upwardly, as ab c, with the free end of tfie extension communicatin with the upper part of the chamber. T0 e ect a cirulat1on 0f air in the chamber O, I introduce into the upper part of saine at oppositg points pipes 0 0 w hich am re sgect1vely supplied w1h valves o 0 so when t e valves arg opened the bot air in the chambei may escape and in its place atinosp heric air admitted, thus reducing the tem erature within-the chamber and preventing t e coflee from being raised to the temperature of the water in the water-chamber. I further augment the ciiculation of air in the air-chamber by providing 0 enings through the jacket at a point aroun the pipe H.

A packing-ring d of any suitable material is-placed over the flanges b and d, thereby af- 'feoting air andwater tigl t joints between said' parts.

The contai f1er Will be supplied with the usual cofiee-bag, (not shown) and when same isfilled with ground coflee and the water in the water-chambler heated to the proper tempera- -ture by openingthe valve k the hot wat0r Will flow from the u{)per end of the pipe k into the bag and perco ating through the c'off'ee willydrop into the contamer D, 0m which it will be drawn through the hollow screw e, pipe e, and cpck a in the usual manner. When sufficient water has been introduced int-o the coflee, the valve 7c is closed until a further su;;ply is needed.

t will be apparent from ehe nature 0f my inviention that any other fluid 0r substance' of low conductivity may be substituted for air in the chamber C without mater ially aflecting th'e operation of my invention.

Having thus des(zribed my 1nvention Whao I claini as new, and desire t0 obtain by Letterslatent, is

I. In an a parafiu s of the dass described, an o1ite1 jac et and an inner jacket with a space between forminga water-chamber, a beveprage-container arranged within the inner jacket and spaced therefrom to form anairchambe r, a draw-ofi pipe connecting with said beve'rage-container, said draw-off pipe being oentra'lly arranged withinalarger p1pe adapted to form an air-chamber surrounding the driaw-ofi pipe and connecting with the airchamber surrounding said beverage-container and means for heating the water m the waterchamber.

2. In an a paratus of the cla: as describeed, an outer jac et and an inner jacket with space therebetween fonning a water-cham: ber, a beverage-container arranged within thc inner jacket and spaced therefrom 130 fon;n an air-chambei, means-for heating the water in the water-chamber and 1neans for effecting a circulation of air 111 the air-ohamher. 

